[FFmpeg-trac] #730(undetermined:open): Encoded video plays too fast for network input

[FFmpeg]

#730: Encoded video plays too fast for network input
-------------------------------------+-------------------------------------
             Reporter:  hackeron     |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  1
-------------------------------------+-------------------------------------

Comment (by hackeron):

 Same thing with an mpeg-es stream from another IP camera:

 {{{
 $ time ffmpeg -re -y -t 10 -i http://admin:@192.168.0.126/test.cmp -acodec
 copy -vcodec libx264 -crf 25 -preset ultrafast ffmpeg.ts
 ffmpeg version git-2011-12-10-78fde93, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Dec 10 2011 19:56:39 with gcc 4.2.1 (Apple Inc. build 5666)
 (dot 3)
   configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD --enable-shared
 --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables
 --cc=/usr/bin/gcc-4.2 --enable-libx264 --enable-libfaac --enable-
 libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-
 libxvid --disable-ffplay
   libavutil    51. 32. 0 / 51. 32. 0
   libavcodec   53. 42. 0 / 53. 42. 0
   libavformat  53. 24. 0 / 53. 24. 0
   libavdevice  53.  4. 0 / 53.  4. 0
   libavfilter   2. 52. 0 /  2. 52. 0
   libswscale    2.  1. 0 /  2.  1. 0
   libpostproc  51.  2. 0 / 51.  2. 0
 [nc @ 0x7f983081ae00] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, nc, from 'http://admin:@192.168.0.126/test.cmp':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: mpeg4, yuv420p, 720x576 [SAR 1:1 DAR 5:4], 100
 fps, 100 tbr, 100 tbn, 100 tbc
 [buffer @ 0x7f983041e3c0] w:720 h:576 pixfmt:yuv420p tb:1/1000000 sar:1/1
 sws_param:
 [libx264 @ 0x7f983081d800] using SAR=1/1
 [libx264 @ 0x7f983081d800] using cpu capabilities: MMX2 SSE2Fast SSSE3
 FastShuffle SSE4.2
 [libx264 @ 0x7f983081d800] profile Constrained Baseline, level 3.2
 [mpegts @ 0x7f983081d200] muxrate VBR, pcr every 10 pkts, sdt every 200,
 pat/pmt every 40 pkts
 Output #0, mpegts, to 'ffmpeg.ts':
   Metadata:
     encoder         : Lavf53.24.0
     Stream #0:0: Video: h264, yuv420p, 720x576 [SAR 1:1 DAR 5:4], q=-1--1,
 90k tbn, 100 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (mpeg4 -> libx264)
 Press [q] to stop, [?] for help
 frame=  999 fps= 15 q=-1.0 Lsize=   10687kB time=00:00:09.98
 bitrate=8772.5kbits/s
 video:9800kB audio:0kB global headers:0kB muxing overhead 9.051934%
 [libx264 @ 0x7f983081d800] frame I:4     Avg QP:28.75  size: 31858
 [libx264 @ 0x7f983081d800] frame P:995   Avg QP:34.00  size:  9958
 [libx264 @ 0x7f983081d800] mb I  I16..4: 100.0%  0.0%  0.0%
 [libx264 @ 0x7f983081d800] mb P  I16..4: 65.4%  0.0%  0.0%  P16..4: 32.1%
 0.0%  0.0%  0.0%  0.0%    skip: 2.5%
 [libx264 @ 0x7f983081d800] coded y,uvDC,uvAC intra: 50.2% 70.0% 6.9%
 inter: 28.3% 64.0% 0.1%
 [libx264 @ 0x7f983081d800] i16 v,h,dc,p: 19% 14% 58% 10%
 [libx264 @ 0x7f983081d800] i8c dc,h,v,p: 51% 21% 23%  5%
 [libx264 @ 0x7f983081d800] kb/s:8036.26

 real    1m33.620s
 user    0m10.997s
 sys     0m0.535s
 }}}

 FFMPEG seems to think the input is 100fps when in reality it's something
 around 20-30fps VFR and records a 10 second video that in reality is a
 minute and a half :/

 Looks like FFMPEG cannot record any live source from http correctly :(

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/730#comment:6>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker